Elec Fuel pump: push or pull?
Thread Starter
|
Senior User
Joined: Nov 2004
Posts: 115
Likes: 0
Elec Fuel pump: push or pull?
My 54 has a brand xx BB V8. Previous owner installed an electric fuel pump on the firewall and the tank is under the bed. I recently had it in the shop, and the mechanic said most times the elec fuel pump is mounted close to the tank to 'push' the fuel vs. 'pulling' to the carb. I'm replacing the fuel line soon, and wonder if this is worth re-locating. FYI, my buddy and I tested the flow at the carb and it seems just fine.
Your excellent advice is great appreciated!
Your excellent advice is great appreciated!
Postmaster
Joined: Jun 2004
Posts: 4,190
Likes: 2
From: Riverside, So Cal
PUSH...absolutely! The fuel pump should be located as close to the tank as possible and below it, so that it is primed by gravity. In a rear tank location, mount it on the frame rail near (and below) the tank. My 56, with the stock tank in the cab, uses a Carter electric pump under the floor.
Roast em' if you got 'em
Joined: Mar 2005
Posts: 21,955
Likes: 9,727
From: Rio Rancho, NM
Ditto to what Randy has said. The majority of pumps are pushers and are designed to be mounted close to the tank and as low as you can get.
Look at the bright side, you will clean up the firewall quite a bit by moving it
Good luck
Bobby
Look at the bright side, you will clean up the firewall quite a bit by moving it
Good luck
Bobby
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
Trending Topics
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
Originally Posted by bigkid99
I've had the occasion to talk to several of the big three on this. Always push. Actually the best is the in-tank since it runs cooler.
Anyone know of one of these?
Sam
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
AFAIK High pressure in tank pumps came along with EFI. didn't need high pressure for carbs, so mechanical diaphram pumps did just fine. Out of tank electric pumps were for multicarbed or mech FI racing engines (but they tended to still be diaphram style)where volume was the need, not pressure. They put the HP pumps in the tank because the rotary vane style pump needed to produce the pressure required tended to heat up and heat the gas. The return line bathes them in a shower of gasoline, and they have an auto shutoff that turns them off before the tank goes completely dry. Used to be you'd get a sputtering warning before the engine quit from running out of fuel, but now they just suddenly shut off...
Fleet Owner
Joined: Jul 2004
Posts: 27,283
Likes: 1,046
From: NM
There were some in-tank carb pumps from early 80's cars, where they had a low-line carb'd engine as base and an EFI "premium" engine; i.e., Chrysler had 2.2L carb'd, TBI, and turbo with MPFI, so they had in-tank pumps for all three situations, with appropriate pressures. I don't know if there were any V8's with in-tank carb-pressure pumps, but a GM TBI pump would only be about 10 - 12 psi, which could be regulated down, as long as you have a return line. How to mount it correctly would be the issue.